History of Mac OS
This video uses footage from The SFC Group:
The Mac operating system has changed dramatically from 1984. From the original Macintosh System Software to MacOS High Sierra, the Mac OS has been upgraded 23 times. Watch the transformation through the screen of a 128k Macintosh, 20th Anniversary Macintosh, 4th gen iMac, and Intel iMac.
Music credit: Pacific Sun - Nicolai Heidlas Music